Black in the breast pocket reads sharp and a little bit evening. The Windermere in black sits just as happily in a charcoal suit for dinner as in a tweed jacket worn with jeans.
It's 100% silk at 32 cm square, with enough body to hold a crisp fold and a sheen that shows up once the lights drop. Try a straight square fold against a light jacket for contrast, or a loose puff when you want it softer.